Chuck



Y Feb. 8, 1949. N. H. IVERSEN CHUCK Filed April 11, 1945 ATTORNEYS Patented Feb. 8, 1949 CHUCK Norman H. Iversen, Birmingham, Mich., assignor to Production Brcaching Corporation, a corporation of Delaware Application April 11, 1945, Serial No.'587,666

2 Claims. (Cl. 279-82) This invention relates to tool chucks or hold- 7 ers and particularly to chucks suitable for securing a tool such as a breach to an actuating head, the device of the present invention being an improvement on the chuck disclosed in my copending application Serial No. 517,688, filed January 10, 1944, now Patent No. 2,386,469.

This invention has for its object to provide a sleeve and its actuating spring are enclosed b a I shield that is attached to the tool receiving end of the chuck.

With the above and other objects in view the invention may be said to comprise the chuck as illustrated in the accompanying drawings, hereinafter described and particularly set forth in the appended claims, together with such variations and modifications thereof as will be apparent to one skilled in the art to which the invention pertains.

Reference should be had to the accompanying drawings forming a part of this specification, in which:

Figure 1 is a side elevation of a chuck with a portion broken away and shown in axial section;

Fig. 2 is a section taken on the line indicated at 2-2 in Fig. 1, and

Fig. 3 is a longitudinal section showing the chuck in tool releasing position.

The chuck of the present invention has a body portion I that is cylindrical throughout the major portion of its length and. that has an axial tool receiving bore 2 opening to the end of the cylindrical portion. The opposite end 3 of the body member is threaded and an enlarged wrench receiving portion 4 is provided between the threaded portion 3 and the cylindrical portion of the body member. The threaded portion 3 provides means of attachment to an actuating head 5, a locknut 6 being provided on the threaded portion 3 between the enlarged portion 4 of the body member and the head 5.

The body member I is provided with radial openings 1 to the axial bore 2 and in the openings I dogs 8- are slidably mounted. The dogs B have tapered tool engaging ends that engage in a. suitable recess in the tool and each dog 8 carries a pin 9 that engages in a slot III in the wall of the opening I to limit the movement of in Fig. 1.

the dogs. The dogs 8 are actuated by means of a sleeve II which has a sliding fit on the cylindrical body member I, the sleeve II having an annular internal recess I2 which in one position of the sleeve permits the dogs 8 to move outwardly to tool releasing position. At the inner end thereof the recess I2 has a beveled shoulder I3 that is adapted to engage with shoulders It on the dogs 8 to move the dogs inwardly to locking position, the inner end of the sleeve I I serving to retain the dogs 8 in locking position.

A spring I5 engages the inner end of the sleeve II and serves to hold the same in its locking position, the spring I5 being a coiled spring surrounding the body member I, With one end engaging the inner end of the sleeve II and its opposite end seated upon an annular disc I6 that fits on the cylindrical portion of the body member I and seats against the enlarged portion 4 of the body member. extending pins I! attached thereto that project beyond the end of the body member I'for engagement with a stop plate I3 which is so disposed as to be engaged by the pins at one limit of movement of the actuating head 5. The engagement of the stop plates I8 with the pins II causes the sleeve II to be moved inwardly in opposition to the spring I5 to the position shown in Fig. 3 where the dogs 8 are free to move into the recess I2 to tool releasing position so that a tool may be inserted into or removed from the bore 2.

At the tool receiving end thereof the body member I has a reduced threaded end portion I9 upon which an annular shield 20 may be screwed. The shield 20 is of an external diameter greater than the sleeve II and has axial openings 2I through which the pins II extend. Suitable sealing rings 22 are mounted in the shield 20 around the openings 2| for engagement with the axially movable pins I! and these sealing rings provide seals which prevent the entry of liquid coolant and metal particles through the openings 2|. The shield 20- has a cylindrical skirt portion 23 that encloses the sleeve II and spring I5, the inner end of the skirt 23 engaging with the spring seating disc I6 and forming with the disc IS a housing for the sleeve and spring.

The sleeve II is normally held in the position shown in Fig. 1 by the spring I5, the shield 20 serving as a stop to limit the outward movement of the sleeve. In this position of the sleeve the dogs 8 are held in tool locking position as shown During operation of the tool, metal chips and liquid coolant containing fine particles The sleeve I I has axially of metal may drop upon the upper end of the tool, but this foreign matter which might otherwise clog the bearing surfaces of the moving parts of the chuck is excluded from the moving parts of the chuck by the shield 2e and sealing rings 22.

It is to beunderstood that variations and modifications of the specific deviceh'erein shown and described for puiposes of illustration, may be made without departing from the spirit of the invention.

What I claim is:

1. A chuck comprising a body member having a tool receiving socket in we end, tool look ing means carried by said body member, means comprising a sleeve slidably mounted on the body member for actuating said locking means, an annular shield of greater diameter than the sleeve attached to the tool receiving end of said body member and overlying the adjacent end of the sleeve, said shield having axial openings alined with the sleeve and a tubular skirt portionienclo'sing thesleeve, axially extending pins extending from said sleeve through said openings, a disc fixed to said body and closing the inner end 'of the annular space between said skirt and said body and a spring interposed between said discand said sleeve to normally hold said sleeve against'saidoverlying portion of said shield.

2. A chuck comprising a body member hav- 4 ing a tool receiving socket in one end and an external shoulder spaced from said end, the portion of the body member between said shoulder and tool receiving end being cylindrical, means for locking a tool in said socket, an annular disc mounted on said body member and seated against said shoulder, a lock. actuating sleeve slidable on'fsaid' body member; a spring: interposed between said disk and sleeve, pins projecting axially from the sleeve past the tool receiving end of the body member, and an annular shield having threaded engagement with the tool receiving end of said body member, said shield having openings through which said pins project, and a tubular Number Name Date 1,209,572 Fg'ly Dec. 1 9, 1916 2,081,940 King May 18, 1937 2,386,469 Iversen Oct. '9, 1945 

